Could various motherboard features like Wake on LAN, Wake on Ring, Wake on PCI/PCI-E, Wake on mouse, Wake on keyboard reduce this figure? Or will it be that figure no matter what.

Since the 2.3 watts was measured with no standby load at all (just the power supply itself), it is probably the lowest achievable with this supply. In an actual system, where the motherboard, USB devices, etc. are using standby power, one would expect the total standby draw to be larger than this; potentially as much as 20-30 watts total draw when the system is off.

If you know how much your motherboard/etc. draws at standby, one might be able to interpolate between the no load test and the lowest load datapoint given to estimate how much standby power will be.
I don't know how accurate such a calculation would be; whether power supplies change much in efficiency over the range of standby power conversions.

That'll depend a lot on the thermal conditions. Remember that SPCRs PSU test rig channels pretty much all heat through one low-speed 120mm fan and the PSU, while Enermax probably made the marketing chart at a constant temperature. I seriously doubt that the lower-power models will have a slower fan to start with, so they shouldn't need to spin up faster than this one. And remember it's still the quietest one tested by SPCR up to and beyond 500W.

Im getting my 425 watt version in a week or 2, hope its quieter than my current PSU, which is by far the loudest thing in my system now, and the only thing left before everything is geared towards quiet operation.

Installed my Modu82+ 625W today. Definitely alot quieter than my Antec TruePower. I started it up externally, did some testing and listened. Right next to my ear, I could barely hear the fan at full power (Prime 95 + GPU crunch around 370W). Installed away.... most Noise definitely coming from the case-fan (Antec 120mm something), which is at low already. If I stop that one the system is very silent (Noctua U12P cpu cooler)

The Enermax PS barely moves any air and I have a 8800GT that idles at 80Â°C and an overclocked e6750 around 3.3GHz so I definitely need the case fan to get some hot air out, I have to think about that, maybe downclock to make it cooler.

Anyway, installation was smooth, cables & connectors left an excellent impression. Will do some proper testing soon.

I RMA'ed a Modu82+ 425 watt PSU which was relatively loud with a beginning fan speed of 650 RPM. I decided to order another unit and hope for better results. I just hooked up the new unit and it is very quiet with a beginning fan speed of 463 RPM. The previous lowest fan speed I have seen reported was 479 rpm. Power usage readings with a Seasonic Power Angel show considerably reduced draw compared to my old Seasonic SS-400.

Thanks for the suggestion to RMA the noisy unit. I have never sent a product back for poor acoustics. I might not have sent this one back either but then I checked the fan speed and realized that the unit was defective. I am really pleased with the replacement.

I just got myself a 625W. Very straightforward and painless install. My old Scythe Ninja fan is now the loudest component in my case.

Here are some pros and cons as I see it -

Pros:
- Very quiet 90% of the time. I had to shine a torch in to make sure the fan was spinning. I can only hear it when I put my ear up near to the exhaust. My normal usage (non-gamer) does not stress it enough to hear it ramp up.
- Easy to use cables. Nice tough sleeving.

Cons:
- 24pin connector. Only the 425W version comes with the 20+4pin, so people with 20pin mobo, please take note. You might need an adapter.
- Cable sleeves do not cover the entire length of the cables. Looks a little bit messy for anal neatfreaks like me.
- the 4pin and 8pin that connects to the mobo are sleeved together and splits to a "Y". I don't use the 8pin, so it was a pain to tuck out of the way.
- Fan rpm wire a little bit too short for wire management. Would have been good if it were 3-4" longer.

I'll be monitoring the fan rpm over the next few weeks, but for sure I know it's spinning slower than my previous leafblower PSU, which might be causing the 1-2deg increase in case temp.

Overall a great PSU. Not totally silent, but very quiet. I'm very happy with it.

The fan growl is starting to irritate me. Tempted to switch back to my HX620 w/Sflex F... but then I lose efficiency, and possibly get some coil whine again (I've changed video cards since my last post).

Hi
I've bought Pro82+ 625W version and after replacing box cooler on my CPU it turned out that this PSU is not that quiet.

Perhaps my PSU is broken or something, but its noise is nowhere similar to recordings from the review of Modu82+ 625W. Despite 500RPM readout, rattling is clearly audible. I can hear no air "whoosh", but that rattling and something that sounds more or less like very old sleeve bearing. It sounds really bad as for 500RPM. I can hear it from around 6-7 meters, when the windows and case are closed.

It's not very noisy, but I can clearly hear it in my room (AC Freezer 7 Pro at 1000RPM, 3x AC Fan 3 at 1100 RPM, GeForce 8800GTS 512, Samsung F1 with Scythe anti-vibration and 160GB Hitachi with custom silencing). I can barely hear noise of other components in my computer over this PSU. When I stop the fan, for a second, this noise disappears.

I have no idea what to do in this case. Swapping the fan was said to be a bad idea. Besides, I live in Poland, where RMA and customer support in general is really bad (but I haven't contacted Enermax so far). I paid around $215 (converted to USD), what is considered a good price, but still it's a lot for me.

I have a spare PSU from my previous computer, but I don't know if I should RMA it. Is there a possibility that Enermax service in Poland will keep this PSU for long time and at the end will tell me that it should work like that and will charge me for unnecessary service operation? (I had such situations, but not with Enermax)

I have the MODU82+ 625 model, which as I understand it is exactly the same as your PSU apart from the modular cables.

The motherboard hardware monitoring utility reports the fan as 470 rpm running a Vista desktop. There is no noise from the Enermax that I can discern, so your rattling noise is not typical and may well indicate a faulty fan.

Thank you for warm welcome and help. (I've been reading official articles for like 4+ years and checking the forum from time to time, but never posted)
Sorry for this thread spam. I tried to prepare some recordings of the noise, but my super-cheap mic is not precise enough. A friend of mine who has some Topower PSU (no mods) visited me yeasterday and said that his PSU is noticably quieter than mine. I'll try to contact official Enermax service / distributor in Poland to check if they will accept this RMA. I hope that they'll replace the fan and it will be as good as described in review and this thread in general.

As this is my first post, many thanks to SPCR and everyone here for the invaluable information I have got all this time!

I am upgrading my PC based on forum info, and as soon as I bought a silent Gigabyte 9600GT my old 400W PSU revealed its inadequacy to handle it by topping up speed and making an awful noise The fact that I've also replaced my case fans with a couple of Yate Loons D12SL12 made this even more intolerable

So, although a bit scared by the reports in this thread about apparent QC issues(?), I bought an Enermax modu82+ 525W, which I am happy to report that it works perfectly.
It starts up at 420/460rpm (as reported by MB's uGuru utility) as expected, at which speed is nearly inaudible as already reported by many.

It now works at 720rpm, which still is very quiet. However, as we are now in the hot Greek summer season, ambient temp at this moment is about 30 C, and PC temps report as CPU 41, System 39, PWM 50, which is still pretty good, isn't it?

Based on the info here, I am soon going for a HR-01 Plus w/ another Yate Loon on it.
In gaming, after a long COD4 session, the Enermax modu82+ went up to 1080rpm, I got 83 C on the silent 9600GT and 46, 41, 55 on the CPU/System/PWM respectively.

The PSU doesn't seem to sweat at all, however what do you think about the temps?

ps. and in the time it took me to write this message it dropped back to 780rpm and the temps back to normal. I think given the room temperature this is excellent performance from this PSU.

Back in early March, MikeC said that at some point he'd be testing the lower power Enermax models to see how the noise/power curve changes, and also to confirm that the performance of the reviewed 625w version was not a fluke.

I just wondered if there was any ETA for this review yet, as I'd be very interested to know whether the 425w version is comparable noise-wise to the reviewed sample.

Back in early March, MikeC said that at some point he'd be testing the lower power Enermax models to see how the noise/power curve changes, and also to confirm that the performance of the reviewed 625w version was not a fluke.

I just wondered if there was any ETA for this review yet, as I'd be very interested to know whether the 425w version is comparable noise-wise to the reviewed sample.

Thanks.

I was wondering the same thing here.

I recienlty upgraded to a E8400 and a Radeon HD 4850 on a new mobo (Asus PQ5 Pro). My 12+ line is reading 11.4V with my SeaSonic 380 and I and getting random crashes when exiting 3D games and when going in/out of S3 sleep. I'm thinking My PSU is not up to the task (it dose not have a "real" PCI-E plug, so I'm using an adaptor off of two different molex lines. It is also missing the P8 connector for the mobo, so I'm only using the P4 connector). I'd like to go with the EMD425AWT as I think the 525W PSU would be overkill.

I'm hoping the fan on the Modu82+ 425 is the same as the Modu82+ 625, but at this point I'd just like something that works

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